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-3(2+x)=138
We move all terms to the left:
-3(2+x)-(138)=0
We add all the numbers together, and all the variables
-3(x+2)-138=0
We multiply parentheses
-3x-6-138=0
We add all the numbers together, and all the variables
-3x-144=0
We move all terms containing x to the left, all other terms to the right
-3x=144
x=144/-3
x=-48
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